Physics 1 - Class XII

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    CONTENTS

    F OREWORD   v 

    PREFACE    xi 

    CHAPTER ONE 

    E LECTRIC CHARGES AND F IELDS

    1.1 Introduction 1

    1.2 Electric Charges 1

    1.3 Conductors and Insulators 5

    1.4 Charging by Induction 6

    1.5 Basic Properties of Electric Charge 8

    1.6 Coulomb’s Law 10

    1.7 Forces between Multiple Charges 15

    1.8 Electric Field 18

    1.9 Electric Field Lines 23

    1.10 Electric Flux 25

    1.11 Electric Dipole 27

    1.12 Dipole in a Uniform External Field 31

    1.13 Continuous Charge Distribution 32

    1.14 Gauss’s Law 33 1.15  Application of Gauss’s Law 37

    CHAPTER TWO

    E LECTROSTATIC POTENTIAL AND C APACITANCE 

    2.1 Introduction 51

    2.2 Electrostatic Potential 53

    2.3 Potential due to a Point Charge 54

    2.4 Potential due to an Electric Dipole 55

    2.5 Potential due to a System of Charges 57

    2.6 Equipotential Surfaces 60 2.7 Potential Energy of a System of Charges 61

    2.8 Potential Energy in an External Field 64

    2.9 Electrostatics of Conductors 67

    2.10 Dielectrics and Polarisation 71

    2.11 Capacitors and Capacitance 73

    2.12  The Parallel Plate Capacitor 74

    2.13 Effect of Dielectric on Capacitance 75

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